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Sept. 18, 1928.

J. F. SLOAN THERMAL CUT-OUT CONSTRUCTION Filed Nov. 6, 1925 Fizz/anion" cJH/V F 64 o/wv mfi/a n WNW Patented Sept. 18, 1928.

v UNITED STATES- PATsNT o FmE.

m 1?. S LOAN, OF PEOBIA, IILDIOIK THERMAL co'r-om'vcoxsrnecnon.

A lication filed November e, 1925. Serial No. 67,205.

My invention relates to a thermal cut-out construction. One of the objects of my invention to PIIOVltlO-ZtfllSC element for bridging between 3 two contacts, whiclr'can be taken out after it is fused aml'replaced in reverse position to reestablish the circuit.

.A further object of my invention is to pro '"vide a constrm-tion, as indicatd above, which 1a will be durable, cheap and ell'cctive.

Further objects will appear from the description and claims.

'In the drawings in which my invention is shown Figure 1 is a side'elevation'al view showing a thermal cut-out construction controlling the circuit through a heating element; and

Fig.2-is an axial section elements.

Referring lo the drawings in detail, the

construction shown therein comprises a pair of contact clips 10 and 11 which are bridged by the fusible inate'rial- 12 in the fuse 'ele- .ment 13 and which maybe connected in the v circuit of a heating coilhoused in the container lat.

'hile the thermal cut-out construction is of general application, in the particular enz bodiment illustrated,. the heating coil is located an a water jacket 14 which ma be connected in the water cooling system 0 an automobile engine for which purpose it is provided with an nlet-connection 15 at the bottom and an outlet connection 16 atthe top.

The clips 10 and 11 may be of any-usual suitable construct-ion adapted to receiye the cartridge type of fusible'element- The fuse element itself is reversible so that 'when the fusible material-l2 is fused and runs from the position shown in Fig. 2 down the inclined tube to the dottedline position shown in Fig. 2 it breaks the electrical con .nection between the upper clip engaging contact l7 and the intermediate clip engaging contact'ISand bridges between the lower clip engaging contact 19 and'the intermediato contact 18. This enables the connection between the clips 10 and 11 to be reestablished simply by removing the fuse element from the clip and reversing the fuse element end for end so. that the contact/19 engages the upper clip 10 and the intermediate contact 18 engages the clip 11.

through the fuse In'the specificembodiment shown the container-may be'formed from two glass tubes 20 and 21 snugly seated within the flanges of the clips l7, l8and 19." The inwardly extending annularbead 21 onthe intermediate'contact 18 provides a contact for "intimate gagement with the fusible material 12 I In the particularconstruction ShOW IiQ' 'if the water jathet 14' becomesdry 'itcaus'es a rise in thetempcrature of the casinglwhich' soon melts the fusible material '12 and-breaks the circuit through the heatingcoil. "This" s'aves currentand prevents injuryto' the'heating (:Oll. 'l he heating,- of course, is not needed if the radiator and water circulation' systemisdryl \Vhen the watercirculationsys tour is again refilled the fuse element 13 can be withdrawn from thecli ps andreversedas outlined above to 'reestablish th'.'-. cir'cuit through the heating'coil.

tacts of a cartridge fuse; a:-re:versil le eai= tridgefuse comprising'an'insu1ating container having two annular ciid contacts and-"an;

intermediate contact, said annularend'con-- tacts being equallyspacedcfroin"the interinediate contact and said clips being spaced.

apart a distance equal to the dist-ancebctwe'en said intermediate contact and each of the end contacts, said annular end contacts heing.al,-'

ternately engageable with one of said coutactembracing clips, and said intermediate;an nular contact being en'gageablewith' the other contact elllbrat'ing t'lip and a fusibleeleinenfin said container which whenfused'breaks electrical connection between -the'in'termediate contact and one end contact and makes electrical connection between the intermed-L ate contact and the other end'contact.

In witness whereof scribed my name.

JOHN F. 'sLoAN,

I have hereunto sub-' 

